在一个脱节的Kerr-cat量子位上进行高保真性噪声偏差操作的量子比较
Bingcheng Qing1, Ahmed Hajr1, Ke Wang1,2
1Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, CA 94720.
概括
研究人员为噪声偏差的量子比特开发了量子控制工具,实现了高保真度并超越了以前的基准. 这项工作建立了用于量子计算的结构噪声架构中验证量子运算的框架.
科学领域:
- 量子计算是一种量子计算.
- 量子错误纠正方法 量子错误纠正方法
- 量子信息科学 量子信息科学
背景情况:
- 量子系统中无处不在的噪音阻碍了量子计算机的开发,需要量子错误纠正代码.
- 带有噪声偏差的量子比特提供了高的容错门和降低了硬件开销,这使得它们成为通用量子计算机的前景.
- 这些平台上的量子操作和噪声结构需要严格的基准测试.
研究的目的:
- 开发一个全面的量子控制工具箱,用于可扩展的噪声偏差量子比特 (detuned Kerr-cat量子比特).
- 系统地描述这些量子运算的噪声结构.
- 建立一个框架来验证结构噪声架构中的性能.
主要方法:
- 开发一个量子控制工具箱,包括初始化,通用单量子比特门和量子非拆除读数.
- 系统的噪声结构特征使用门组断层扫描和二面随机基准测试.
- 不调节的Kerr-cat量子位性能的基准测试,包括噪声偏差和相变时间.
主要成果:
- 实现了较高的本地网关保真度:[公式:见文本]和[公式:见文本].
- 解调的Kerr-cat量子位噪声偏差接近250以[公式:参见文本]的相变时间,超过了共振对应物.
- 仅从位翻转和相翻转时间推断操作噪声偏差的高估.
结论:
- 开发的量子控制工具箱和表征框架对于基于噪音的量子比特操作至关重要.
- 为Kerr-cat量子位建立的最先进的性能基准.
- 强调需要对噪声偏差量子比特操作进行精确,直接的基准测试,以实现高效的量子错误校正.
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